document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1155686>Question 1155686</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Suppose it is known that 40% of U.S. citizens believe that there need to be stricter gun laws. A simple random sample of 120 U.S. citizens is drawn.\r<BR>\n" );
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document.write( "Find the mean number of people in samples of size 120 who believe that there need to be stricter gun laws.\r<BR>\n" );
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document.write( "Find the standard deviation of the number of people in samples of size 120 who believe that there need to be stricter gun laws. (Round your answer to two decimal places.) </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #778314 by </B><A HREF=/tutors/aboutme.mpl?userid=Boreal><B>Boreal(15235)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Boreal><IMG SRC=http://www.algebra.com/images/aboutme-small.gif BORDER=0 alt=\"About Me\" VALIGN=MIDDLE></A>&nbsp;<IMG SRC=http://www.algebra.com/cgi-bin/show-face.mpl?user=Boreal><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=778314\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> The mean would be np or 120*0.4=48 people<BR>\n" );
document.write( "the variance is np(1-p)=48*0.6=28.8<BR>\n" );
document.write( "sd = sqrt(V)=5.37 people </SPAN>\n" );
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